Small Block Chevy Stroker - A Stroke Of Genius Part II

Hye Tech Performance Seals Up Its 391 Stroker Small-Block

Mike Petralia Jul 1, 2001 0 Comment(s)
Sucp_0107_07_z Small_block_chevy_stroker Oil_pan 2/16

This Milodon oil pan is clearanced for longer stroke engines, and Marquez lowers the pan on for a fit check, finding that there were no interference problems.

Breathing Room
If your engine doesn't get enough air into its cylinders, then it won't be able to produce power it can be proud of. Besides the camshaft, the cylinder heads affect breathing more than any other component. To get the best breathing possible without sacrificing streetable low-end power, Holley's Street Avenger cylinder heads feature an efficient 184cc intake runner volume. With its high-tech 68cc combustion chamber, and 2.02/1.60-inch stainless valves, the Avenger heads flow 223 cfm on the intake side and 173 cfm on the exhaust, both at 0.500-lift.

That works out to an impressive 78 percent intake to exhaust flow ratio, and since we know that max cfm through the cylinder heads does not always equate to max power at the crank, we agreed with Bogosian that these cylinder heads should produce a strong and wide power band that will probably top out around 6,200 rpm on this engine. Capped off with Holley's dual-plane Street Avenger intake manifold and the vacuum secondary carb, this engine should pull some great bottom-end grunt!

Light The Fire
A hot street engine can't do diddly without a hot spark, so Bogosian again choose the dyno-matched route and will install Holley's complete Annihilator ignition system, including a billet distributor, wires, a coil, and a digital spark box. Capable of supplying enough voltage to power a diesel/electric submarine, the Annihilator ignition should have no trouble lighting this big Mouse's fire! Also to be added before the dyno test session, will be a Holley mechanical fuel pump, Lunati pushrods, and a Weiand mechanical water pump with March Performance serpentine pulleys. Check back with us next month as we detail the dyno test session and find out if the stroker from a different point of view can muster the power to run with the big dogs.


March Performance
Naples, FL 34110
Manley Performance Products
Lakewood, NJ 08701
JE Pistons
Huntington Beach, CA 92649
Holley Performance Products
Bowling Green, KY 42101
Lunati LLC
Olive Branch, MS
Jeg's High Performance
Delaware, OH 43015
(800) 345-4545
C.A.T. Power engine parts
Baldwin Park, CA 91706




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